Figure legends
Figure 1 : Deviations of monthly mean temperature and
precipitation for 2016 (blue bars, panel A) and 2017 (red bars, panel B)
calculated as the difference from the 2000-2015 average value at the
site. Temperature of April 25th, 2016 measured at
canopy level (24 m) is reported in inset graph of panel a , while
the annual precipitation of the year 2016 (blue dots), 2017 (red dots)
and the long-term average (black dots) is reported in the inset graph of
panel b .
Figure 2 : Seasonal dynamics of Leaf area index (LAI,
m2 m–2, panel a ) and daily
stem radial increment (panel b) for the years 2016, 2017 and the
2000-2015 reference period. LAI was derived from Moderate Resolution
Imaging Spectroradiometer (MODIS, see Materials and Methods), for 2016
(blue line), 2017 (red line) and for the 2000-2015 reference period
(black line). Solid lines are the modelled LAI pattern, using two
logistic functions for the increasing and decreasing phases. Dots are
the raw MODIS-LAI values. In panel b the daily radial increment
for 2016 (blue dots) and 2017 (red dots) are shown, while the inset
graph reports the long-term series data of Basal Area chronology (BAI,
cm2 year–1), where the last two
dots represent the BAI value obtained in 2016 (blue dot) and 2017 (red
dot), respectively.
Figure 3 : Phenological data for the experimental beech forest
site (top panel) and seasonal dynamic of NSCs content as total NSCs
(panel a ), starch (panel b ) and soluble sugars (panelc ).In the top panel, the different colours represent dormancy
(dark orange), the period between the green up and the maximum Leaf area
index (LAI, m2 m–2) value (light
green), the maximum LAI (dark green), the senescence phase (light
orange) and, finally, the leafless period after the late frost in 2016
(grey). In the panels a, b, and c, blue and red dots represent
carbohydrate concentrations of 2016 and 2017, respectively, while the
black lines and grey area show modelled intra annual dynamic of
carbohydrates and 95 % interval of confidence (1.96 SE), respectively.
Each point is the mean of five beech trees and bars are the intervals of
confidence (1.96 SE) (see Material and Methods). Modelled values are
derived from 39 and 28 measurements of starch and soluble sugar content,
respectively.